Synthesis of visible light active copper, iron co-doped BiVO4 photocatalyst for the degradation of phenol

Naqvi, Faria K.; Beg, Saba; Anwar, Kaseed

doi:10.1007/s11144-020-01863-z

Cited by 16 publications

(6 citation statements)

References 38 publications

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“…The prominent peak located at 600 nm is consistent, but peak intensities changed dramatically. This transition may be attributed to defects corresponding to the Tb 3+ and V 5+ content, which affect particle sizes and defect levels, but the PL emission is primarily dependent on the Tb 3+ content since its inclusion causes changes in defects or material disorder . More oxygen vacancies are formed as the Tb 3+ content rises, affecting the properties of solid electrolytes.…”

Section: Resultsmentioning

confidence: 99%

“…After complete calcination, pellets of Tb/Bi 4 V 2 O 11 were prepared similarly as discussed earlier. 3,22 4.2. Photocatalytic Reduction of Cadmium (II).…”

Section: Discussionmentioning

confidence: 99%

“…After subsequent heat treatment, the final powder was obtained. After complete calcination, pellets of Tb/Bi 4 V 2 O 11 were prepared similarly as discussed earlier. , …”

Section: Methodsmentioning

confidence: 99%

“…Hole scavengers primarily inhibit charge carrier recombination. ,− They also generate secondary reducing hydroxyl radicals, which help with photoreduction. , The choice of an effective photocatalyst is critical in this photoreduction process. Bismuth vanadium oxide (Bi 4 V 2 O 11 ) and doped Bi 4 V 2 O 11 possess some unique properties such as low band gap, low cost, high stability, availability, and environmental friendly nature, which make it an ultimate choice as a catalyst. , The photoreduction efficiency strongly depends on the catalyst physical features such as band gaps. , Therefore, for improving the recombination rate of photogenerated electrons and holes in Bi 4 V 2 O 11 , modification of its activity in the UV–visible region, is necessary. ,,,, Tb 3+ as a low-band-gap material and UV–vis-driven agent has attracted interest because of its low toxicity. Therefore, in this research, it has been attempted to reduce cadmium ions using a Tb 3+ -doped Bi 4 V 2 O 11 (Tb/Bi 4 V 2 O 11 ) photocatalytic system to boost the adsorption and reduction performance.…”

Section: Introductionmentioning

confidence: 99%

“…Bismuth vanadium oxide (Bi 4 V 2 O 11 ) and doped Bi 4 V 2 O 11 possess some unique properties such as low band gap, low cost, high stability, availability, and environmental friendly nature, which make it an ultimate choice as a catalyst. 3,22 The photoreduction efficiency strongly depends on the catalyst physical features such as band gaps. 2,23 Therefore, for improving the recombination rate of photogenerated electrons and holes in Bi 4 V 2 O 11 , modification of its activity in the UV−visible region, is necessary.…”

Section: Introductionmentioning

confidence: 99%

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Ex Situ Method for Photoreduction of the Cadmium Ion from Terbium-Loaded Bismuth Vanadium Oxide

2021

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The photoreduction of Cd (II) to Cd (0) was performed using Bi 4 V 2 O 11 , which was tremendously enhanced by Tb 3+ -doped Bi 4 V 2 O 11 . The relationship between charge carrier isolation and light harvesting was studied in depth in this research, and a promising technique for fabricating effective photocatalysts for heavy metals was discovered. Lattice disorder effects due to size variance between V 5+ and Tb 3+ cations in Bi 4 V 2 O 11 nanomaterials substituted with an invariable Tb 3+ cation at different concentrations (x = 15, 20, and 25%). Bi 4 V 2 O 11 and 15% Tb/Bi 4 V 2 O 11 evidenced a coexistence of monoclinic (α-phase) with a CS/m symmetry, while 25% Tb/Bi 4 V 2 O 11 was tetragonal (γ-phase) with an I4/mmm symmetry. Raman scattering experiments elucidated the changes in Bi 4 V 2 O 11 lattice corresponding to oxygen motion, suggesting significant destabilization of the VO 4 tetrahedra after addition of Tb 3+ . The SEM micrograph depicted a disparity in the microstructure with reduced grain size in 25% Tb/ Bi 4 V 2 O 11 samples. However, the TEM micrographs of 25% Tb/Bi 4 V 2 O 11 nanomaterials revealed that crystallite sizes of 25−35 nm were obtained, presenting a single tetragonal phase, highly homogeneous in nature. Impedance spectroscopy was used to study the conductivity of these compounds in the temperature range of 300 °C. At 300 °C, the compounds with x = 25% showed a conductivity of 15.92 S cm −1 . The conductivity values were found to be comparable with the highest values reported in the literature for similar compounds.

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Section: Resultsmentioning

confidence: 99%

“…After complete calcination, pellets of Tb/Bi 4 V 2 O 11 were prepared similarly as discussed earlier. 3,22 4.2. Photocatalytic Reduction of Cadmium (II).…”

Section: Discussionmentioning

confidence: 99%

“…After subsequent heat treatment, the final powder was obtained. After complete calcination, pellets of Tb/Bi 4 V 2 O 11 were prepared similarly as discussed earlier. , …”

Section: Methodsmentioning

confidence: 99%